Under-Display Opening Layout With Auxiliary Layer and Dams
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Solution Overview
Problem
Conventional display devices face challenges in maintaining a wide space for image display due to the presence of camera, flash, speaker, and other components outside the image display area, leading to reduced display quality and reliability.
Innovation Solution
A display device design that includes a substrate with a display area and a peripheral area surrounding an opening, featuring a transistor, a first electrode, an auxiliary layer, a pixel definition layer, intermediate and emission layers, and encapsulation layers, with dams in the peripheral area to manage the opening and enhance reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If camera, flash, speaker, and other components are provided outside the image display area, then these functions can be integrated, but the space for image display is reduced
Solution Approach 1:
The patent utilizes the opening area (typically used for sensors or other components) to accommodate camera, flash, and speaker components. By transitioning from the traditional peripheral placement to utilizing the opening dimension, the display area is maximized while still integrating multiple functions within the device structure.
2Adaptability or versatility
If the opening area is used for components, then device functionality is enhanced, but display quality and reliability are compromised
Solution Approach 1:
The patent introduces an auxiliary layer positioned between the transistor and the first electrode, overlapping the first electrode in plan view. This auxiliary layer acts as an intermediary protective structure that prevents wiring damage while allowing the opening area to be utilized for components, thereby maintaining both functionality and reliability.
Solution Approach 2:
The auxiliary layer is placed in advance before the light-emitting element is formed, providing protective coverage over the first electrode and underlying wiring. This preemptive protective measure prevents potential damage during subsequent manufacturing processes and operation, ensuring reliability without compromising the functional benefits of the opening area.
3Reliability
If the auxiliary layer extends beyond the first electrode, then protection is improved, but manufacturing complexity increases
Solution Approach 1:
The auxiliary layer is strategically positioned to overlap specifically with the first electrode and extend to provide protection where needed, rather than uniformly covering the entire device. This localized approach provides effective wiring protection while minimizing unnecessary material usage and simplifying the manufacturing process compared to a comprehensive protective layer.
Data Source
AI summary
A display device includes: a substrate including a display area and a peripheral area surrounding an opening; a transistor disposed in the display area; a first electrode electrically connected to the transistor; an auxiliary layer disposed between the transistor and the first electrode and overlapping the first electrode in a plan view; a pixel definition layer overlapping the first electrode and an edge of the auxiliary layer in the plan view; an intermediate layer, an emission layer, and a second electrode disposed on the first electrode; at least one or more dams disposed on the peripheral area; and an encapsulation layer disposed on the light-emitting element. The intermediate layer includes a cutting part disposed between the display area and the opening.